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arXiv 1202.0750math.ACmath.CO
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单纯树支持的单体分解

Monomial Resolutions Supported By Simplicial Trees

Sara Faridi

摘要:

我们探讨单形树支持的单项理想的决议。我们认为,由于单纯树是非循环的,拜耳,Peeva和Sturmfels检查的标准,如果一个单纯复形支持一个自由分解的单项理想减少到检查,某些诱导subcomplex连接。然后,我们使用Peeva和Velasco的结果表明,每一个单纯树出现作为一个单项理想的围巾复杂,因此支持一个最小的决议。我们还提供了一种方法来构造比Peeva和Velasco构造的更小的Scarf理想。

英文摘要:

We explore resolutions of monomial ideals supported by simplicial trees. We argue that since simplicial trees are acyclic, the criterion of Bayer, Peeva and Sturmfels for checking if a simplicial complex supports a free resolution of a monomial ideal reduces to checking that certain induced subcomplexes are connected. We then use results of Peeva and Velasco to show that every simplicial tree appears as the Scarf complex of a monomial ideal, and hence supports a minimal resolution. We also provide a way to construct smaller Scarf ideals than those constructed by Peeva and Velasco.

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